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<H1 id="MPI_T_category_get_info">MPI_T_category_get_info</H1>
Get the information about a category 
<H2>Synopsis</H2>
<PRE>
</PRE>
<PRE>
int MPI_T_category_get_info(int cat_index, char *name, int *name_len,
                            char *desc, int *desc_len, int *num_cvars,
                            int *num_pvars, int *num_categories)
</PRE>

<P>
<H2>Input Parameters</H2>
<DL>
<DT><B>cat_index </B> <DD> index of the category to be queried (integer)
</DL>
<P>
<H2>Input/Output Parameters</H2>
<DL>
<DT><B>name_len </B> <DD> length of the string and/or buffer for name (integer)

<DT><B>desc_len </B> <DD> length of the string and/or buffer for desc (integer)
</DL>
<P>
<H2>Output Parameters</H2>
<DL>
<DT><B>name </B> <DD> buffer to return the string containing the name of the category (string)

<DT><B>desc </B> <DD> buffer to return the string containing the description of the category (string)

<DT><B>num_cvars </B> <DD> number of control variables in the category (integer)

<DT><B>num_pvars </B> <DD> number of performance variables in the category (integer)

<DT><B>num_categories </B> <DD> number of categories contained in the category (integer)
</DL>
<P>
<H2>Thread and Interrupt Safety</H2>
<P>
This routine is thread-safe.  This means that this routine may be
safely used by multiple threads without the need for any user-provided
thread locks.  However, the routine is not interrupt safe.  Typically,
this is due to the use of memory allocation routines such as <tt>malloc
</tt>or other non-MPICH runtime routines that are themselves not interrupt-safe.
<P>
<H2>Errors</H2>
<P>
All MPI routines (except <tt>MPI_Wtime</tt> and <tt>MPI_Wtick</tt>) return an error value;
C routines as the value of the function and Fortran routines in the last
argument.  Before the value is returned, the current MPI error handler is
called.  By default, this error handler aborts the MPI job.  The error handler
may be changed with <tt>MPI_Comm_set_errhandler</tt> (for communicators),
<tt>MPI_File_set_errhandler</tt> (for files), and <tt>MPI_Win_set_errhandler</tt> (for
RMA windows).  The MPI-1 routine <tt>MPI_Errhandler_set</tt> may be used but
its use is deprecated.  The predefined error handler
<tt>MPI_ERRORS_RETURN</tt> may be used to cause error values to be returned.
Note that MPI does <em>not</em> guarantee that an MPI program can continue past
an error; however, MPI implementations will attempt to continue whenever
possible.
<P>
<DL>
<DT><B>MPI_SUCCESS </B> <DD> No error; MPI routine completed successfully.
</DL>
<DL>
<DT><B>MPI_T_ERR_INVALID_INDEX </B> <DD> Index is invalid or has been deleted.
</DL>
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<DT><B>MPI_T_ERR_NOT_INITIALIZED </B> <DD> The MPI tool information interface is not initialized.
</DL>
<DL>
<DT><B>MPI_ERR_OTHER </B> <DD> Other error; use <tt>MPI_Error_string</tt> to get more information
about this error code. 
</DL>
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